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page-dtrace_probes_rdoc.ri
U:RDoc::TopLevel[ i I"dtrace_probes.rdoc:EFcRDoc::Parser::Simpleo:RDoc::Markup::Document: @parts[ S:RDoc::Markup::Heading: leveli: textI"DTrace Probes;To: RDoc::Markup::BlankLine o: RDoc::Markup::Paragraph;[I"UA list of DTrace probes and their functionality. "Module" and "Function" cannot ;TI"Lbe defined in user defined probes (known as USDT), so they will not be ;TI"7specified. Probe definitions are in the format of:;T@ o:RDoc::Markup::Verbatim;[I".provider:module:function:name(arguments) ;T: @format0o; ;[I"SSince module and function cannot be specified, they will be blank. An example ;TI"-probe definition for Ruby would then be:;T@ o;;[I"Jruby:::method-entry(class name, method name, file name, line number) ;T;0o; ;[I"QWhere "ruby" is the provider name, module and function names are blank, the ;TI"Fprobe name is "method-entry", and the probe takes four arguments:;T@ o:RDoc::Markup::List: @type: BULLET: @items[ o:RDoc::Markup::ListItem: @label0;[o; ;[I"class name;To;;0;[o; ;[I"method name;To;;0;[o; ;[I"file name;To;;0;[o; ;[I"line number;T@ S; ; i; I"Probes List;T@ S; ; i; I"Stability;T@ o; ;[I"UBefore we list the specific probes, let's talk about stability. Probe stability ;TI"Pis declared in the probes.d file at the bottom on the #pragma D attributes ;TI"Hlines. Here is a description of each of the stability declarations.;T@ o;;: LABEL;[ o;;[I" Provider name stability;T;[o; ;[I"RThe provider name of "ruby" has been declared as stable. It is unlikely that ;TI"Dwe will change the provider name from "ruby" to something else.;T@ o;;[I""Module and Function stability;T;[o; ;[I"RSince we are not allowed to provide values for the module and function name, ;TI"Bthe values we have provided (no value) is declared as stable.;T@ o;;[I"Probe name stability;T;[o; ;[I"OThe probe names are likely to change in the future, so they are marked as ;TI"I"Evolving". Consumers should not depend on these names to be stable.;T@ o;;[I" Probe argument stability;T;[o; ;[I"PThe parameters passed to the probes are likely to change in the future, so ;TI"Othey are marked as "Evolving". Consumers should not depend on these to be ;TI" stable.;T@ S; ; i; I"Declared probes;T@ o; ;[I"QProbes are defined in the probes.d file. Here are the declared probes along ;TI":with when they are fired and the arguments they take:;T@ o;;;;[ o;;[I"Bruby:::method-entry(classname, methodname, filename, lineno);;T;[ o; ;[I"9This probe is fired just before a method is entered.;T@ o;;: NOTE;[ o;;[I"classname;T;[o; ;[I"!name of the class (a string);To;;[I"methodname;T;[o; ;[I"7name of the method about to be executed (a string);To;;[I" filename;T;[o; ;[I"@the file name where the method is _being called_ (a string);To;;[I" lineno;T;[o; ;[I"@the line number where the method is _being called_ (an int);T@ o; ;[I"h*NOTE*: will only be fired if tracing is enabled, e.g. with: <code>TracePoint.new{}.enable</code>. ;TI"QSee Feature#14104[https://bugs.ruby-lang.org/issues/14104] for more details.;T@ o;;[I"Cruby:::method-return(classname, methodname, filename, lineno);;T;[ o; ;[I"QThis probe is fired just after a method has returned. The arguments are the ;TI"#same as "ruby:::method-entry".;T@ o; ;[I"h*NOTE*: will only be fired if tracing is enabled, e.g. with: <code>TracePoint.new{}.enable</code>. ;TI"QSee Feature#14104[https://bugs.ruby-lang.org/issues/14104] for more details.;T@ o;;[I"Cruby:::cmethod-entry(classname, methodname, filename, lineno);;T;[o; ;[I"RThis probe is fired just before a C method is entered. The arguments are the ;TI"#same as "ruby:::method-entry".;T@ o;;[I"Druby:::cmethod-return(classname, methodname, filename, lineno);;T;[o; ;[I"OThis probe is fired just before a C method returns. The arguments are the ;TI"#same as "ruby:::method-entry".;T@ o;;[I":ruby:::require-entry(requiredfile, filename, lineno);;T;[o; ;[I"OThis probe is fired on calls to rb_require_safe (when a file is required).;T@ o;;;;[o;;[I"requiredfile;T;[o; ;[I"2the name of the file to be required (string).;To;;[I" filename;T;[o; ;[I"/the file that called "+require+" (string).;To;;[I" lineno;T;[o; ;[I">the line number where the call to require was made (int).;T@ o;;[I";ruby:::require-return(requiredfile, filename, lineno);;T;[o; ;[I"OThis probe is fired just before rb_require_safe (when a file is required) ;TI"Oreturns. The arguments are the same as "ruby:::require-entry". This probe ;TI"Awill not fire if there was an exception during file require.;T@ o;;[I"?ruby:::find-require-entry(requiredfile, filename, lineno);;T;[o; ;[I"QThis probe is fired right before search_required is called. search_required ;TI"Odetermines whether the file has already been required by searching loaded ;TI"Sfeatures (<code>$"</code>), and if not, figures out which file must be loaded.;T@ o;;;;[o;;[I"requiredfile;T;[o; ;[I"&the file to be required (string).;To;;[I" filename;T;[o; ;[I"-the file that called "require" (string).;To;;[I" lineno;T;[o; ;[I">the line number where the call to require was made (int).;T@ o;;[I"@ruby:::find-require-return(requiredfile, filename, lineno);;T;[o; ;[I"FThis probe is fired right after search_required returns. See the ;TI"Sdocumentation for "ruby:::find-require-entry" for more details. Arguments for ;TI"<this probe are the same as "ruby:::find-require-entry".;T@ o;;[I"5ruby:::load-entry(loadedfile, filename, lineno);;T;[o; ;[I"SThis probe is fired when calls to "load" are made. The arguments are the same ;TI" as "ruby:::require-entry".;T@ o;;[I"6ruby:::load-return(loadedfile, filename, lineno);;T;[o; ;[I"LThis probe is fired when "load" returns. The arguments are the same as ;TI""ruby:::load-entry".;T@ o;;[I"/ruby:::raise(classname, filename, lineno);;T;[o; ;[I"5This probe is fired when an exception is raised.;T@ o;;;;[o;;[I"classname;T;[o; ;[I"4the class name of the raised exception (string);To;;[I" filename;T;[o; ;[I"Athe name of the file where the exception was raised (string);To;;[I" lineno;T;[o; ;[I"Ethe line number in the file where the exception was raised (int);T@ o;;[I"7ruby:::object-create(classname, filename, lineno);;T;[o; ;[I"AThis probe is fired when an object is about to be allocated.;T@ o;;;;[o;;[I"classname;T;[o; ;[I"/the class of the allocated object (string);To;;[I" filename;T;[o; ;[I"@the name of the file where the object is allocated (string);To;;[I" lineno;T;[o; ;[I"Dthe line number in the file where the object is allocated (int);T@ o;;[I"3ruby:::array-create(length, filename, lineno);;T;[o; ;[I"@This probe is fired when an Array is about to be allocated.;T@ o;;;;[o;;[I" length;T;[o; ;[I"!the size of the array (long);To;;[I" filename;T;[o; ;[I"?the name of the file where the array is allocated (string);To;;[I" lineno;T;[o; ;[I"Cthe line number in the file where the array is allocated (int);T@ o;;[I"2ruby:::hash-create(length, filename, lineno);;T;[o; ;[I">This probe is fired when a Hash is about to be allocated.;T@ o;;;;[o;;[I" length;T;[o; ;[I" the size of the hash (long);To;;[I" filename;T;[o; ;[I">the name of the file where the hash is allocated (string);To;;[I" lineno;T;[o; ;[I"Bthe line number in the file where the hash is allocated (int);T@ o;;[I"4ruby:::string-create(length, filename, lineno);;T;[o; ;[I"@This probe is fired when a String is about to be allocated.;T@ o;;;;[o;;[I" length;T;[o; ;[I""the size of the string (long);To;;[I" filename;T;[o; ;[I"@the name of the file where the string is allocated (string);To;;[I" lineno;T;[o; ;[I"Dthe line number in the file where the string is allocated (int);T@ o;;[I"1ruby:::symbol-create(str, filename, lineno);;T;[o; ;[I"@This probe is fired when a Symbol is about to be allocated.;T@ o;;;;[o;;[I"str;T;[o; ;[I"(the contents of the symbol (string);To;;[I" filename;T;[o; ;[I"@the name of the file where the string is allocated (string);To;;[I" lineno;T;[o; ;[I"Dthe line number in the file where the string is allocated (int);T@ o;;[I",ruby:::parse-begin(sourcefile, lineno);;T;[o; ;[I";Fired just before parsing and compiling a source file.;T@ o;;;;[o;;[I"sourcefile;T;[o; ;[I"#the file being parsed (string);To;;[I" lineno;T;[o; ;[I"2the line number where the source starts (int);T@ o;;[I"*ruby:::parse-end(sourcefile, lineno);;T;[o; ;[I":Fired just after parsing and compiling a source file.;T@ o;;;;[o;;[I"sourcefile;T;[o; ;[I"#the file being parsed (string);To;;[I" lineno;T;[o; ;[I"1the line number where the source ended (int);T@ o;;[I" ruby:::gc-mark-begin();;T;[o; ;[I",Fired at the beginning of a mark phase.;T@ o;;[I"ruby:::gc-mark-end();;T;[o; ;[I"&Fired at the end of a mark phase.;T@ o;;[I" ruby:::gc-sweep-begin();;T;[o; ;[I"-Fired at the beginning of a sweep phase.;T@ o;;[I"ruby:::gc-sweep-end();;T;[o; ;[I"'Fired at the end of a sweep phase.;T@ o;;[I":ruby:::method-cache-clear(class, sourcefile, lineno);;T;[o; ;[I",Fired when the method cache is cleared.;T@ o;;;;[o;;[I" class;T;[o; ;[I"6the classname being cleared, or "global" (string);To;;[I"sourcefile;T;[o; ;[I"#the file being parsed (string);To;;[I" lineno;T;[o; ;[I"1the line number where the source ended (int);T: @file@:0@omit_headings_from_table_of_contents_below0